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(No Model.)

E .P. MONROE. PISTON ROD PACKING.

No. 245,967. f PatentedAug. 23,1881.

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J$\l^ f `U WiFl-IEEEES- fi, Irv/Erwan UNITED STATES APATENT OEEICE.

EDWIN P. MONROE, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED STATESMETALLIC PACKING COMPANY, OF BOSTON, MASS. i

PISTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 245,967, dated August23, 1881. Application filed February 11, 1EBV1. (No model) To all whomit may concern Be it known that I, EDWIN P. MONROE, of the city, county,and State of New York, have invented a new and useful ImprovementtinPiston- Rod Packing, of which the following description, in connectionwith the accompanying drawing, is a specication.

My invention relates to a metallic packing for piston-rods, and has forits object to produce a more simple and readily-constructed packing thanthose heretofore in use, the same being self-adj usting to compensatefor wear and for irregularities in the movement ot' the piston-rod. l

In one kind ofmetallic packing heretofore in use a rocking cup isemployed having a spherical bearing-piece upon the cylinder or a packingcase fixed thereto, and having aconical or ta peringpassage, throughwhich thepiston-rod passes. The packingrings are made conical Y on theiroutside to tit the passage in the said socket and cylindrical on theirinside to tit the pistonrod. Tte object in making the packingrings andtheir socket in the rocking cup tapering is to enable the said rings tobe constantly wedged upto a tight bearing upon the pistonrod. Thespherical bearing-piece, in connection with the cup, permits it to rockto enable the packing-rings to conform to the piston-rod, if thelatterin its reciprocation deviates from the direct line, owing to wearin its guides, or from other causes.

This, my present invention, has for its object to enable the sphericalbearing-piece to be dispensed with without losing anything in theadjustability of the packing to irregularities in the movementof thepistonrod, and thus simplifying and cheapenin g the construction of theparts and making the packing more compact and convenient.

My invention consists in a piston-rod-packy ing ring having a sphericalor zone-shaped eX- terior, and contained within a packingrecepacre whichlsupports the packing-ring and permits the latter to both rock and bemoved longitudinally in the receptacle, according to the requirements ofthe piston-rod, and to compensate for wear; also, in a packing-ringhaving its outer portion made spherical or zoneto lit the piston-rod.

shaped, combined with a receptacle or socket@ 5o piece therefor, havingan internal bearing-surface, also made zone-shaped, to receive andsupport the said packing-ring, which thus has a spherical bearing in itsreceptacle and is free to rock to accommodate irregularities in themovement of the piston-rod. The surfaces of the ring and receiver incontact are of such shape that thc wear occurring between the ring andpistou -rod is compensated for automatically by pressing the packingringby a suitable 6o follower and spring or by the Huid-pressure more deeplyinto the socket, the ring, which may be split, being thereby closed orcontracted The packing-receptacle is connected with the cylinder-head bya suitable union or coupling in such a manner that ithas a free lateralmovement to compensate for deviations from right-line movement ot' therod.

Tile drawing shows a pistou-rod packing 7o embodying my invention.

The rod a and partition, wall, or cylinder head b may be that ot' anyapparatus in which a rod is required to move and maintain a steam, Huid,or air tight t.

The packing-recel'itacle c is connected with the cylinder-head b by theunion or coupling d, (shown as fastened to the cylinder-head b,) or theusual stuffing-box projection b thereon, by bolts e, the said receptaclebeing free to move 8o laterally on its bearing 2 on the said couplingtl-to compensate for lateral vibration or change in position of the rod2. The said packingreceptacle o is provided internally with a curvedsocket, furnishing a bearing-surface, 3, shaped as a zone ofa sphere, toreceive and support the packing-rings fm n, zone-shaped externally toproperly u'twithin the said socket, and shaped internally to bear evenlyon the outside of the piston-rod a. The packing-rings m a will pref- 9oerably be acted upon, as usual, by thefollower o and spring s, to pressthe packing-rings into ltheir socket in the direction of the arrow 5,

the pressure ot' the steam or other uid in the cylinder also having thesame tendency.

Owing to the spherical shape of the bearingsurface 3 between thepacking-receptacle c and the packingrings m a, the latter are perfectlyfree to rock in any direction, and permit the inner bearing-surfaces ofthe packin g-rin gs to remain always in contact with the pistonrod a;and sincethe internal bearing-surface of the receptacle is of largerdiameter at 011e than at the other end the packing-rings, when pressedinto the receptacle in the direction of the arrow 5, will quickly andeasily be wedged or contracted by the said surface 3 into closer contactwith the piston-rod a, the spherical surface between the ring and thereceptacle, as herein shown and described, performing the function ofthe conical surface in the packc c ings heretofore in use, and also ofthe rocking bearing-piece, such as shown in reissued patent of theUnited States, No. 9,365, August 31, 1880, upon which this my inventionis intended to be an improvement.

In this my invention the packing itself always has a free rockingmovement, and as it Wears Will also sink more deeply into thepacking-receptacle in the direction of the arrow 5, and will thus alwaysmaintain a tight iit on the piston-rod.

The chock t, upon which the spring s in this instance has its bearing,prevents the packingreceptable c from being carried back in a directionopposite to the arrow 5 in case the packing adheres to the rod a, whenmoved in that direction, and the said chock is arranged, as shown, topermit the follower o and packing m n to move a small amount in thisdirection after the receptacle c has been stopped, to thus remove thepacking slightly from its bearing in the curved surface 3, so that itwill no longer be pressed or wedged thereby against the rod a.. After asufficient movement to thus relieve the pressure on the packing thefollower is itself positively stopped by the chock t and the adhesionbetween the rod and packing overcome without bringing too great a strainupon the spring s, which, without this arrangement of the chock t, wouldhave to overcome the said adhesion by the gradual increase in pressure,or usually by the shock received when the coils of the spring arebrought wholly together, thus straining the said spring.

Itis not necessary that the coupling d should have its bearing on theextreme end of the packing-receptacle c, as shown, and it may sometimesbe desirable to provide the said receptacle with a shoulder or flange tobe engaged by the said coupling, in which case the said receptable mayextend out from the cylinder b beyond the said union d, if desired.

One or more packing-rings, like m n, may be employed, and they may beeither split or not, as desired, it being found that the metal of whichthey are formed will compress and coliform itself to its socket and thepiston-rod as the latter acts upon it to wear it away.

I am aware that a packing-ring has been made oval externally, but itwill be obvious that an oval-surfaced ring cannot rock freely, as can myzone-shaped ring, the bearing-surface of which is a portion of a perfectsphere.

I claim- 1. The herein-described packing-rin g,l1avin g a cylindricalinner surface to t the rod to be packed, and a spherical or Zone-shapedouter bearing-surface contained within a suitable receptacle to supportthe said packing-ringin operative position, as described,the saidspherical bearing-surface permitting the packingring to rock and movefreely and adjust itself to the movement and wear of the piston-rod,substantially as described.

2. In a piston-rod packing, the packing and the packing-receptaclehaving a bearing-surface, 3, between them, curved as described, wherebythe said ring is permitted to rock freely and universally in thereceiver, according to the requirements of the piston-rod, and also tobe compressed by movement in a longitudinal direction over thepiston-rod to compensate for wear, substantially as described.

3. The packing-ring having a zone-shaped external bearing-surface andthe receptacle therefor, combined with a spring and follower to pressthe said ring into the receptacle, to thereby wedge it into closecontact with the piston-rod, substantially as described.

4. The rod a and cylinder-head b, combined with the zone-shapedpacking-ring and receptacle therefor, and the coupling d, to connect thesaid receptacle to the cylinder-head, having a bearing, 2, for the saidreceptacle, whereby the said receptacle is permitted to have freelateral movement thereon, substantially as and for the purposedescribed.

5. The packing-receptacle, packing-ring therein, and follower andspring, combined with the chock t, arranged, as described,-to preventthe movement of the receptacle with the piston-rod, and thereafter topositively stop the said follower after the packing has been moved fromits bearing in the receptacle,

'substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

E DWIN I). MONROE.

Witnesses:

HULBERT Pack, FRANK J. HART.

IOO

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